bcachefs: Add flushed_seq_ondisk to journal_debug_to_text()

Also, make the wait in bch2_journal_flush_seq() interruptible, not just
killable.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/journal.c

@@ -639,9 +639,10 @@ int bch2_journal_flush_seq(struct journal *j, u64 seq)
 	u64 start_time = local_clock();
 	int ret, ret2;
 
-	ret = wait_event_killable(j->wait, (ret2 = bch2_journal_flush_seq_async(j, seq, NULL)));
+	ret = wait_event_interruptible(j->wait, (ret2 = bch2_journal_flush_seq_async(j, seq, NULL)));
 
-	bch2_time_stats_update(j->flush_seq_time, start_time);
+	if (!ret)
+		bch2_time_stats_update(j->flush_seq_time, start_time);
 
 	return ret ?: ret2 < 0 ? ret2 : 0;
 }
@@ -1160,6 +1161,7 @@ void __bch2_journal_debug_to_text(struct printbuf *out, struct journal *j)
 	       "seq:\t\t\t%llu\n"
 	       "last_seq:\t\t%llu\n"
 	       "last_seq_ondisk:\t%llu\n"
+	       "flushed_seq_ondisk:\t%llu\n"
 	       "prereserved:\t\t%u/%u\n"
 	       "nr flush writes:\t%llu\n"
 	       "nr noflush writes:\t%llu\n"
@@ -1172,6 +1174,7 @@ void __bch2_journal_debug_to_text(struct printbuf *out, struct journal *j)
 	       journal_cur_seq(j),
 	       journal_last_seq(j),
 	       j->last_seq_ondisk,
+	       j->flushed_seq_ondisk,
 	       j->prereserved.reserved,
 	       j->prereserved.remaining,
 	       j->nr_flush_writes,